/*
   Copyright (c) 2012 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2012-04-09 Marco Riccardi - initial implementation
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.IElement;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLAttribute;
import org.mizartools.utility.xml.XMLElement;

public class ReductionRegistrations implements IElement {


    public static final String NAME = "ReductionRegistrations";

    private INode parentNode;
    private String aid = null;
    private String mizfiles = null;

    private Signature signature = null;
    private LinkedList<Reduction> reductionList = new LinkedList<Reduction>();


    private ReductionRegistrations(INode parentNode){
        this.parentNode = parentNode;
    }

    public INode getParentNode() {
        return parentNode;
    }

    public static ReductionRegistrations newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        ReductionRegistrations reductionRegistrations = new ReductionRegistrations(parentNode);
        XMLElement xmlElement = xmlElementList.poll();
        if (!xmlElement.getName().equals(NAME)){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a " + NAME, xmlElementList);
        }
        for (XMLAttribute xmlAttribute : xmlElement.getXMLAttributeList()){
            if (xmlAttribute.getName().equals("aid")){
                if (reductionRegistrations.aid == null){
                    reductionRegistrations.aid = xmlAttribute.getValue();
                } else {
                    throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
                } 
            } else 
            if (xmlAttribute.getName().equals("mizfiles")){
                if (reductionRegistrations.mizfiles == null){
                    reductionRegistrations.mizfiles = xmlAttribute.getValue();
                } else {
                    throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
                } 
            } else 
                throw new ElementParseException(ElementParseException.NOT_VALID_ATTRIBUTE_ELEMENT, "XMLElement has not a valid attribute " + xmlAttribute.getName(), xmlElementList);
        }

        if (!xmlElement.isEmpty()){
            while (true){
                xmlElement = xmlElementList.peek();
                if (xmlElement == null){
                    throw new ElementParseException(ElementParseException.UNEXPECTED_END_OF_FILE, "Unexpected end of XMLElement list");
                }
                if (xmlElement.getName().equals(NAME) && xmlElement.isEndElement()){
                    xmlElement = xmlElementList.poll();
                    break;
                }
                if (xmlElement.getName().equals("Signature")){
                    if (reductionRegistrations.signature == null) {
                        reductionRegistrations.signature = Signature.newInstance(reductionRegistrations, xmlElementList);
                    } else { 
                        throw new ElementParseException(ElementParseException.DUPLICATE_ELEMENT, "XMLElement list contains a duplicated <Signature> in element " + NAME, xmlElementList);
                    }
                } else if (xmlElement.getName().equals("Reduction")){
                    reductionRegistrations.reductionList.add(Reduction.newInstance(reductionRegistrations, xmlElementList));
                } else 
                    throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "The XMLElement " + xmlElement.getName() + " is not valid in " + NAME, xmlElementList);
            }
        }

        return reductionRegistrations;
    }

    public LinkedList<XMLElement> getXMLElementList() {
        LinkedList<XMLElement> xmlElementList = new LinkedList<XMLElement>();
        XMLElement xmlElement = new XMLElement(NAME);
        if (this.aid != null) {
            XMLAttribute xmlAttribute = new XMLAttribute("aid", this.aid);
            xmlElement.getXMLAttributeList().add(xmlAttribute);
        }
        if (this.mizfiles != null) {
            XMLAttribute xmlAttribute = new XMLAttribute("mizfiles", this.mizfiles);
            xmlElement.getXMLAttributeList().add(xmlAttribute);
        }
        xmlElementList.add(xmlElement);
        if (this.signature != null){
            xmlElementList.addAll(this.signature.getXMLElementList());
        }
        for (Reduction reduction : this.reductionList){
            xmlElementList.addAll(reduction.getXMLElementList());
        }
        xmlElement = new XMLElement(NAME);
        xmlElement.setEndElement(true);
        xmlElementList.add(xmlElement);
        return xmlElementList;
    }

    public String getAid(){
        return aid;
    }

    public Signature getSignature(){
        return signature;
    }

    public LinkedList<Reduction> getReductionList(){
        return reductionList;
    }

	public String getMizfiles() {
		return mizfiles;
	}

	@Override
	public void accept(Visitor visitor) {
		if (visitor.visit(this)) {
			for(Reduction reduction: this.reductionList) {
				reduction.accept(visitor);
			}
		}
		visitor.endVisit(this);
	}

	@Override
	public String toString(){
		ToStringVisitor toStringVisitor = new ToStringVisitor();
		this.accept(toStringVisitor);
		return toStringVisitor.toString();
	}
}
